US11969738B2 - Hydraulic mantle assembly system for a gyratory rock crusher - Google Patents
Hydraulic mantle assembly system for a gyratory rock crusher Download PDFInfo
- Publication number
- US11969738B2 US11969738B2 US17/271,553 US201917271553A US11969738B2 US 11969738 B2 US11969738 B2 US 11969738B2 US 201917271553 A US201917271553 A US 201917271553A US 11969738 B2 US11969738 B2 US 11969738B2
- Authority
- US
- United States
- Prior art keywords
- annular
- mantle
- nut body
- main shaft
- hydraulic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active, expires
Links
- 239000011435 rock Substances 0.000 title claims abstract description 27
- 239000012530 fluid Substances 0.000 claims description 11
- 210000002445 nipple Anatomy 0.000 claims description 7
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 5
- 238000010009 beating Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- QFXZANXYUCUTQH-UHFFFAOYSA-N ethynol Chemical group OC#C QFXZANXYUCUTQH-UHFFFAOYSA-N 0.000 description 1
- 231100000206 health hazard Toxicity 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C2/00—Crushing or disintegrating by gyratory or cone crushers
- B02C2/02—Crushing or disintegrating by gyratory or cone crushers eccentrically moved
- B02C2/04—Crushing or disintegrating by gyratory or cone crushers eccentrically moved with vertical axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C2/00—Crushing or disintegrating by gyratory or cone crushers
- B02C2/005—Lining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C2/00—Crushing or disintegrating by gyratory or cone crushers
- B02C2/02—Crushing or disintegrating by gyratory or cone crushers eccentrically moved
- B02C2/04—Crushing or disintegrating by gyratory or cone crushers eccentrically moved with vertical axis
- B02C2/06—Crushing or disintegrating by gyratory or cone crushers eccentrically moved with vertical axis and with top bearing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C2210/00—Codes relating to different types of disintegrating devices
- B02C2210/02—Features for generally used wear parts on beaters, knives, rollers, anvils, linings and the like
Definitions
- the present invention relates generally to systems and methods for assembling a mantle in a gyratory rock crusher, and in particular to systems and methods for applying tensile force during assembly and disassembly of gyratory rock crusher mantle systems.
- Rock crushers are commonly used in mining applications in order to reduce large rocks to smaller rocks, gravel or dust, depending on the rock type and required end use.
- a gyratory rock crusher is a popular type of crusher that employs a funnelled crushing chamber, known as a concave, that guides input rock to a centre hole.
- a mantle system is suspended inside the centre hole and includes a main shaft and a mantle attached to the main shaft.
- the main shaft is generally connected to an actuating system below the crushing chamber, which through the use of belts or eccentric gears swings the main shaft and mantle through a gyratory motion adjacent lower edges of the crushing chamber. Rocks are progressively broken to smaller sizes before passing through the aperture formed between the concave and the mantle.
- Gyratory rock crushers are often huge machines, capable of processing over 8000 tonnes of material per hour. Accordingly, the mantle and crushing chamber generally must be extremely robust, including heavy-duty wear resistant plates.
- the mantle is generally fixed to the main shaft by a large threaded nut, known as the head nut, sometimes exceeding 1200 mm in diameter, which is threaded onto the main shaft.
- the head nut sometimes exceeding 1200 mm in diameter, which is threaded onto the main shaft.
- both the concave, mantle and head nut can suffer significant wear and require replacement.
- the action of crushing rocks against the crushing chamber generally plastically deforms and axially lengthens the mantle, which adds significant tension to the head nut.
- Nut removal techniques thus include welding protrusions onto the periphery of the head nut and beating the nut with hammers, battering rams or even rock breaker tools on an excavator arm.
- Other head nut removal processes involve the use of oxy-acetylene cutting torches to burn through a “torch ring” positioned under the head nut, which collapses the ring and relieves the load on the head nut.
- Such practices are difficult and dangerous owing to the conditions and spatial restrictions in which the operations must be performed.
- epoxy setting compounds are used to bed the mantle to the inner cone. The use of flame cutting torches can ignite the compounds, thereby creating a fire danger and health hazard.
- the invention resides in a hydraulic mantle system for a gyratory rock crusher, the system comprising:
- the system further comprises an annular sacrificial cover positioned over the annular nut body.
- a top face of the annular nut body comprises a plurality of threaded through holes that each receive a lock screw.
- a top face of the annular hydraulic piston comprises a plurality of blind holes that each receive a distal end of a lock screw.
- a high pressure inner seal and a high pressure outer seal provide a hydraulic seal between the annular nut body and the annular hydraulic piston.
- a lower end of the annular hydraulic piston defines a recess that receives an upper edge of the annular mantle.
- an outer diameter of the upper edge of the annular mantle is greater than an outer diameter of a side surface of the annular nut body against which the hydraulic piston engages.
- an inner diameter of the upper edge of the annular mantle is greater than an outer diameter of a side surface of the annular nut body against which the hydraulic piston engages.
- the top face of the annular nut body comprises a plurality of hydraulic fluid access holes.
- the plurality of hydraulic fluid access holes are each sealed with a plug, which plugs are replaceable with a hydraulic fluid nipple and adapter.
- O-rings separate outer sides of the annular nut body and hydraulic piston against inner sides of the sacrificial cover.
- the sacrificial cover is bolted to the annular nut body.
- a spanner is boltable to the top face of the annular nut body.
- FIG. 1 is a partially cut-away side perspective view of an assembled mantle system for a gyratory rock crusher, according to some embodiments of the present invention.
- FIG. 2 is a partially cut-away side view of the assembled mantle system of FIG. 1 .
- FIG. 3 is a top exploded perspective view of the hydraulic nut assembly of the mantle system of FIG. 1 .
- FIG. 4 is a partially cut-away side view of the hydraulic nut assembly of the mantle system of FIG. 1 .
- FIG. 5 is a further partially cut-away side view of the hydraulic nut assembly of the mantle system of FIG. 1 , but with the sacrificial cover removed.
- FIG. 6 is a top view of a spanner, according to an embodiment of the present invention.
- the present invention relates to a hydraulic mantle system for a hydraulic rock crusher. Elements of the invention are illustrated in concise outline form in the drawings, showing only those specific details that are necessary for understanding the embodiments of the present invention, but so as not to clutter the disclosure with excessive detail that will be obvious to those of ordinary skill in the art in light of the present description.
- adjectives such as first and second, left and right, above and below, top and bottom, upper and lower, rear, front and side, etc., are used solely to define one element or method step from another element or method step without necessarily requiring a specific relative position or sequence that is described by the adjectives.
- Words such as “comprises” or “includes” are not used to define an exclusive set of elements or method steps. Rather, such words merely define a minimum set of elements or method steps included in a particular embodiment of the present invention.
- the present invention is defined as a hydraulic mantle system for a gyratory rock crusher, the system comprising:
- Advantages of some embodiments of the present invention include the ability to safely, quickly and efficiently replace a worn and deformed mantle of a gyratory rock crusher. Workers are able to operate safely in the confined space adjacent to the rock crusher main shaft, and without resorting to the “heating and beating” techniques of the prior art, which techniques often required use of a cutting torch to cut through a damaged and deformed nut that fastened a worn rock crusher mantle to a main shaft. By employing a hydraulic tightening and loosening process, even severely damaged and deformed mantles can be readily removed and replaced.
- FIG. 1 is a partially cut-away side perspective view of an assembled mantle system 100 for a gyratory rock crusher, according to some embodiments of the present invention.
- the system 100 includes a main shaft 105 , a mantle 110 , and a hydraulic nut assembly 115 .
- the hydraulic nut assembly 115 comprises a sacrificial cover 120 secured to an annular nut body 125 .
- the annular nut body 125 is threaded onto external threads 130 of the main shaft 105 .
- An annular hydraulic piston 135 slidingly engages with the annular nut body 125 .
- An upper neck portion 140 of the mantle is compressed between a flange 145 of the main shaft 105 and the annular hydraulic piston 135 .
- the flange 145 can comprise various geometries or components against which the upper neck portion of a mantle is compressed.
- the main shafts of some crushers include a through bolt and multiple tapered components, which are retained by their weight and the tensioning of a head nut.
- FIG. 2 is a partially cut-away side view of the assembled mantle system 100 . As shown, an upper edge 205 of the mantle 110 is received in a lower recess 210 of the hydraulic piston 135 .
- FIG. 3 is a top exploded perspective view of the hydraulic nut assembly 115 .
- socket screws 305 extend through holes 310 in the sacrificial cover 120 and are threaded into holes 315 on a top face 320 of the annular nut body 125 .
- the top face 320 also includes hydraulic access holes 330 , which are sealed for example by a plug.
- the access holes 330 permit the passage of a charging medium (usually oil) during assembly and disassembly.
- the holes 330 are plugged during operation of the crusher.
- a plurality of lock screws 335 are threaded through the top face 320 and around a perimeter of the top face 320 .
- FIG. 4 is a partially cut-away side view of the hydraulic nut assembly 115 .
- the lower recess 210 of the hydraulic piston 135 is clearly shown.
- a threaded hole 415 in the annular nut body 125 for a lock screw 335 is also shown.
- a blind hole 420 in the hydraulic piston 135 that receives a distal end of a lock screw 335 .
- An upper O-ring 405 seals an outer side of the annular nut body against an inner side of the sacrificial cover 120 .
- a lower O-ring 410 seals an outer side of the hydraulic piston 135 against an inner side of the sacrificial cover 120 .
- a high pressure inner seal 425 and a high pressure outer seal 430 provide a hydraulic seal between the annular nut body 125 and the annular hydraulic piston 135 .
- the inner seal 425 is fixed to the annular nut body 125 and slidingly engages an inner surface of the hydraulic piston 135 during axial displacement of the hydraulic piston 135 ; whereas the outer seal 430 is fixed to the hydraulic piston and slidingly engages an outer surface of the annular nut body 125 during axial displacement of the hydraulic piston 135 .
- the axial height of the outer surfaces of the annular nut body 125 that engage the inner surfaces of the hydraulic piston 135 define a maximum stroke of the hydraulic nut assembly 115 , which maximum stroke is limited for example in some embodiments to 12 mm.
- the hydraulic piston 135 is illustrated in FIG. 4 at zero stroke. In use, as the piston 135 moves axially away from the annular nut body 125 , the high pressure inner seal 425 and outer seal 430 seal hydraulic fluid inside a toroidal piston cavity.
- FIG. 5 is a further partially cut-away side view of the hydraulic nut assembly 115 , but with the sacrificial cover 120 removed.
- An adapter 505 is shown threaded onto the annular nut body 125
- a hydraulic fluid nipple 510 is shown threaded onto the adapter 505 .
- an outer diameter of the upper edge 205 of the annular mantle 110 is greater than an outer diameter of a side surface of the annular nut body 125 against which the hydraulic piston 135 engages.
- an inner diameter of the upper edge 205 of the annular mantle 110 is greater than an outer diameter of a side surface of the annular nut body 125 against which the hydraulic piston 135 engages. That is illustrated for example in FIG. 5 , where a radius r′ of an outer side surface of the annular nut body 125 engages with an inner side surface of the annular hydraulic piston 135 , and where a radius r′′ of an outer side surface of the lower recess 210 of the hydraulic piston 135 engages with the inner surface of the upper edge 205 of the annular mantle 110 , and where r′′>r′.
- the relative dimensions described above assist in providing a direct transfer of loads from the lock screws 335 to the upper edge 205 of the annular mantle 110 , and assist in easy disassembly of the mantle system 100 , even after the mantle 110 has suffered significant wear and deformation.
- FIG. 6 is a top view of a spanner 600 , according to an embodiment of the present invention.
- Bolts (not shown) can be placed through the holes 605 in the spanner 600 and threaded into the holes 315 on the top face 320 of the annular nut body 125 . That enables the annular nut body 125 to be easily rotated by exerting force against the handles 610 of the spanner 600 .
- the mantle 110 is first placed over the main shaft 105 and against the flange 145 .
- the sacrificial cover 120 is then removed from the hydraulic nut assembly 115 by unbolting the socket screws 305 from the annular nut body 125 and sliding the cover 120 upwards.
- the spanner 600 is bolted to the top face 320 of the annular nut body 125 .
- the nut body 125 is screwed down tightly on the external threads 130 of the main shaft 105 , which presses the hydraulic piston 135 against an upper edge 205 of the mantle 110 .
- the nut body 125 is then backed off by 1 ⁇ 4 to 1 ⁇ 2 turn to prevent hydraulic locking of the hydraulic nut assembly 115 .
- a plug is removed from a hydraulic access hole 330 , and the adapter 550 and hydraulic fluid nipple 510 are fitted to the top face 320 .
- the spanner 600 is then removed and any lock screws 335 which were previously removed to enable seating of the spanner 600 are replaced.
- the hydraulic fluid nipple 510 is then connected to a hydraulic pump (not shown).
- the pump is then operated to slowly charge the hydraulic nut assembly 115 to an appropriate pressure, such as for example 10,000 psi or 700 bar.
- the lock screws 335 are manually screwed down onto the hydraulic piston 135 .
- a relief valve on the pump is then opened slowly to reduce the hydraulic pressure in the hydraulic nut assembly 115 , which transfers the tensile force generated hydraulically onto the lock screws 335 .
- the pump is then disconnected from the hydraulic fluid nipple 510 and the adapter 505 and nipple 510 are removed and the hydraulic access hole 330 is sealed with a suitable threaded plug.
- the sacrificial cover 120 is reassembled on the hydraulic nut assembly 115 and bolted to the annular nut body 125 .
- Disassembly of the mantle system 100 is essentially the reverse of the above with the sacrificial cover 120 removed to permit connection of the hydraulic apparatus and charging to release load on the lock screws 335 . With these backed off, release of charge pressure will de-tension the assembly. Should the hydraulic apparatus fail for any reason, the lock screws 335 can be incrementally backed off to release the load manually, thus providing a further degree of safety and assured function.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
Description
-
- a main shaft having a flange and external threads adjacent the flange;
- an annular nut body having side surfaces and having internal threads that are threaded onto the external threads of the main shaft;
- an annular hydraulic piston having side surfaces that slidingly engage the side surfaces of the annular nut body; and
- an annular mantle having an upper neck portion and a lower edge portion, the main shaft extending through the upper neck portion;
- wherein the upper neck portion of the annular mantle is compressed between the flange of the main shaft and the annular hydraulic piston.
-
- a main shaft having a flange and external threads adjacent the flange;
- an annular nut body having side surfaces and having internal threads that are threaded onto the external threads of the main shaft;
- an annular hydraulic piston having side surfaces that slidingly engage the side surfaces of the annular nut body; and
- an annular mantle having an upper neck portion and a lower edge portion, the main shaft extending through the upper neck portion;
- wherein the upper neck portion of the annular mantle is compressed between the flange of the main shaft and the annular hydraulic piston.
Claims (11)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2018247208A AU2018247208A1 (en) | 2018-10-09 | 2018-10-09 | Hydraulic Mantle Assembly System for a Gyratory Rock Crusher |
AU2018247208 | 2018-10-09 | ||
PCT/AU2019/051002 WO2020073077A1 (en) | 2018-10-09 | 2019-09-19 | Hydraulic mantle assembly system for a gyratory rock crusher |
Publications (2)
Publication Number | Publication Date |
---|---|
US20210322995A1 US20210322995A1 (en) | 2021-10-21 |
US11969738B2 true US11969738B2 (en) | 2024-04-30 |
Family
ID=70163642
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/271,553 Active 2041-04-12 US11969738B2 (en) | 2018-10-09 | 2019-09-19 | Hydraulic mantle assembly system for a gyratory rock crusher |
Country Status (8)
Country | Link |
---|---|
US (1) | US11969738B2 (en) |
EP (1) | EP3863766A4 (en) |
JP (1) | JP7425044B2 (en) |
KR (1) | KR102637500B1 (en) |
CN (1) | CN112770843B (en) |
AU (2) | AU2018247208A1 (en) |
CA (1) | CA3110104A1 (en) |
WO (1) | WO2020073077A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3808455A1 (en) * | 2019-10-17 | 2021-04-21 | Sandvik SRP AB | A head nut assembly and a gyratory crusher applying the same |
US11679389B2 (en) * | 2021-05-21 | 2023-06-20 | Metso Outotec USA Inc. | Mantle retaining system and method for a gyratory crusher |
US11819857B1 (en) | 2022-07-19 | 2023-11-21 | Kleemann Gmbh | Apparatus and method for lifting a crushing mantle of a cone or gyratory crusher and crusher comprising such an apparatus for lifting |
US11911773B2 (en) | 2022-07-19 | 2024-02-27 | Kleemann Gmbh | Apparatus and method for attaching a crushing mantle of a cone crusher to a carrier cone of the cone crusher and for detaching the crushing mantle from the carrier cone |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06170258A (en) | 1992-12-08 | 1994-06-21 | Kawasaki Heavy Ind Ltd | Mounting structure of driving gear tooth of gyratory crusher |
US7048214B2 (en) | 2002-08-23 | 2006-05-23 | Louis Wein Johnson | Gyratory crusher with hydrostatic bearings |
JP2012250306A (en) * | 2011-06-02 | 2012-12-20 | Ntn Corp | Bearing hydraulic nut |
WO2012171778A2 (en) | 2011-06-17 | 2012-12-20 | Sandvik Intellectual Property Ab | Crusher, crushing shell, and method of attaching crushing shell |
US20140042714A1 (en) * | 2011-02-02 | 2014-02-13 | John Wentworth Bucknell | High-pressure sealing ring |
EP2929940A1 (en) | 2014-04-09 | 2015-10-14 | Sandvik Intellectual Property AB | Inner crushing shell retaining assembly |
AU2015243593B2 (en) * | 2014-04-09 | 2018-11-15 | Flsmidth A/S | Fastening of the crushing cone in a cone crusher |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3064909A (en) * | 1959-09-16 | 1962-11-20 | Reserve Mining Co | Protective ring for crusher locking nut |
GB1039062A (en) * | 1964-06-29 | 1966-08-17 | Barber Greene Co | Hydraulic release means for gyratory crushers |
US9157469B2 (en) * | 2011-07-08 | 2015-10-13 | Metso Minerals Industries, Inc. | Locking nut assembly for a cone crusher |
US9346057B2 (en) * | 2014-01-14 | 2016-05-24 | Metso Minerals Industries, Inc. | Top supported mainshaft suspension system |
-
2018
- 2018-10-09 AU AU2018247208A patent/AU2018247208A1/en active Pending
-
2019
- 2019-09-19 WO PCT/AU2019/051002 patent/WO2020073077A1/en unknown
- 2019-09-19 KR KR1020217011516A patent/KR102637500B1/en active IP Right Grant
- 2019-09-19 JP JP2021510918A patent/JP7425044B2/en active Active
- 2019-09-19 AU AU2019358873A patent/AU2019358873A1/en not_active Abandoned
- 2019-09-19 CN CN201980064252.1A patent/CN112770843B/en active Active
- 2019-09-19 US US17/271,553 patent/US11969738B2/en active Active
- 2019-09-19 EP EP19871491.7A patent/EP3863766A4/en active Pending
- 2019-09-19 CA CA3110104A patent/CA3110104A1/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06170258A (en) | 1992-12-08 | 1994-06-21 | Kawasaki Heavy Ind Ltd | Mounting structure of driving gear tooth of gyratory crusher |
US7048214B2 (en) | 2002-08-23 | 2006-05-23 | Louis Wein Johnson | Gyratory crusher with hydrostatic bearings |
US20140042714A1 (en) * | 2011-02-02 | 2014-02-13 | John Wentworth Bucknell | High-pressure sealing ring |
JP2012250306A (en) * | 2011-06-02 | 2012-12-20 | Ntn Corp | Bearing hydraulic nut |
WO2012171778A2 (en) | 2011-06-17 | 2012-12-20 | Sandvik Intellectual Property Ab | Crusher, crushing shell, and method of attaching crushing shell |
EP2929940A1 (en) | 2014-04-09 | 2015-10-14 | Sandvik Intellectual Property AB | Inner crushing shell retaining assembly |
AU2015243593B2 (en) * | 2014-04-09 | 2018-11-15 | Flsmidth A/S | Fastening of the crushing cone in a cone crusher |
Non-Patent Citations (1)
Title |
---|
International Search Report for International Patent Application No. PCT/AU2019/051002 dated Nov. 25, 2019. |
Also Published As
Publication number | Publication date |
---|---|
JP7425044B2 (en) | 2024-01-30 |
AU2019358873A1 (en) | 2021-03-18 |
JP2022503612A (en) | 2022-01-12 |
KR20210071001A (en) | 2021-06-15 |
EP3863766A1 (en) | 2021-08-18 |
WO2020073077A1 (en) | 2020-04-16 |
CN112770843A (en) | 2021-05-07 |
AU2018247208A1 (en) | 2020-04-23 |
CA3110104A1 (en) | 2020-04-16 |
US20210322995A1 (en) | 2021-10-21 |
KR102637500B1 (en) | 2024-02-16 |
EP3863766A4 (en) | 2022-08-17 |
CN112770843B (en) | 2022-11-04 |
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